USER HANDBOOK 1.2 | ECC DIO / ECC AIO
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250000600_ECC-DIO-AIO_Anwenderhandbuch_EN.docx
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6.3.2. I/O mapping
The I/O mapping contains the analogue outputs (AO) channel 0–5 (CH0_AO to CH5_AO) and the analogue
inputs (AI) channel 0–11 (CH0_AI to CH11_AI).
The analogue inputs consist of a REAL value, that contains the measured analogue value and a status byte of
the type USINT. The status byte must be checked to validate the input before usage and to detect errors.
Depending on the configuration of each channel, the value shown can be interpreted as millivolts (mV), as
milliampere (mA) or as degrees Celsius (°C).
Fig. 29: ECC AIO I/O mapping
Coding of the status bytes
Status
Description
Bit 0
Positive overvoltage in the AI_U mode
Bit 1
Negative overvoltage in the AI_U mode
Bit 2
Wire breakage detection in the AI_PT mode
Bit 3
Reserved
Bit 4
Reserved
Bit 5
Reserved
Bit 6
Reserved
Bit 7
PT multiplexer signal (only for diagnostic purposes)
